One hundred thirty-three cardinals participate in this pivotal event, following the death of Pope Francis.
The conclave to elect the 267th head of the Roman Catholic Church has officially commenced in the Sistine Chapel, Vatican City, with 133 cardinal electors participating.
The cardinals have taken an oath of secrecy and proceeded to take their seats at tables draped in red curtains and brown tablecloths, arranged in two rows within the chapel.
Following the traditional declaration of 'extra omnes,' all individuals except the voting cardinals were asked to leave, and the doors were closed.
The first and only voting session of the day is anticipated to conclude after 7 PM local time.
Should a papal candidate not be chosen, the ballots will be mixed with cartridges containing potassium perchlorate, anthracene—a component of coal tar—and sulfur to produce black smoke, signaling that no pope has been elected.
Conversely, if a new pope is selected, the ballots will be mixed with potassium chlorate, lactose, and chloroform resin to create white smoke, which denotes a successful election and the announcement of 'Habemus Papam'—'we have a pope.'
Among the frontrunners for the papacy are Pietro Parolin, Vatican Secretary of State; Matteo Cupi, head of the Italian Bishops' Conference; Peter Turkson from Ghana; and Luis Antonio Tagle from the Philippines.
The last two conclaves, held in 2005 and 2013, lasted only two days each.
Pope Francis was elected after a two-day voting process in 2013 and passed away on April 21, at the age of 89, being interred in the Santa Maria Maggiore Basilica in Rome.
The mechanism for announcing the election result via smoke is steeped in historical significance.
The tradition of burning ballots as a means of conveying results dates back to the 15th century and has been implemented to prevent manipulation and ensure transparency during the election process, particularly in response to past long delays that caused unrest among the faithful.
As Vatican attention shifted toward the conclave following
Pope Francis's passing on Easter Monday, it was confirmed that a solemn mass would be held in St. Peter's Basilica on May 7, after which the cardinals will convene in the Sistine Chapel to embark on the detailed voting procedure.
The smoke signal system is not without complexity; it involves the establishment of two furnaces within the chapel—one for burning the ballots and the other for generating smoke signals.
Both setups are intricately connected to pipes leading to the roof, where smoke is emitted through a discreetly placed chimney.
Firefighters were seen securing the chimney outlet on the chapel's roof, while technicians installed the furnaces inside the structure, which dates back over five centuries and is adorned with Michelangelo's frescoes.
Testing of this system is conducted days prior to the conclave to ensure that the smoke is visible and rises adequately.
Even firefighters participate in these tests, ready to respond to any potential malfunction, highlighting the meticulous nature of this process.
The logistical setup is complicated, as any failure could escalate into a significant incident.
Each installation requires careful consideration to avoid damaging the chapel's interior, with every joint needing to be airtight and tested meticulously.
Once a pope is elected, all equipment associated with the process is immediately dismantled.
To ensure the smoke is as visible as possible, custom chemical mixtures are utilized, creating two distinct smoke signals.
Black smoke is generated from a mixture of potassium perchlorate, anthracene, and sulfur, producing a thick, dark cloud.
In contrast, white smoke is created using a combination of potassium chlorate, lactose, and pine resin, resulting in a light, airy plume.
Traditionally, wet straw was used for denser dark smoke, while dry straw was employed for a lighter signal, though this could sometimes cause confusion as the smoke might appear gray.
Today’s chemical packages are securely packaged and ignited electronically, minimizing the risk of ambiguity.
Additionally, bells are rung to further validate the smoke signals, a practice that started during the election of Benedict XVI.
While there have been suggestions to modernize the signaling system with light signals or digital notifications, the Vatican remains committed to this ritual, viewing it as not only a method of communication but also a significant act of continuity with the past.
The church's adherence to tradition contrasts sharply with modern technological advances, emphasizing the ritual's deep theological significance.